Filling 02/Acetylene tanks

[HawkX66]

I don't use them every day, but when I do need them my oxy/acetylene torches are priceless. I have a 250 cuft O2 tank and a 124 cuft acetylene tank. Since I moved I don't have my regular sources anymore. I went to a local supply to check on getting them filled at some point and they told me unless you have a receipt with the serial numbers on it, you can't get tanks that big filled anymore. He also said you can't buy them now, but it looks like I can on line. He said all you can do is lease them or buy small ones. Madness...
What is everyone doing for filling their tanks? I know I'm not the only one in this situation.